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Old April 8, 2013, 09:57 AM   #5
Join Date: March 4, 2005
Location: Ohio
Posts: 13,300
You only want a faster powder in the short barrel if you are fighting muzzle blast problems. Otherwise, the powder that produces the most velocity in the 20" barrel will also produce the most velocity in the 16" barrel. You normally have to get down to pistol barrel lengths before that stops being true.
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